Lecture 2 - Mammalian Cell Structure Flashcards
What is the Largest organelle found in Eukaryotic cells
The Nucleus
What are the 3 roles of the Nucleus?
- Controls Cellular Activity
- Houses Genomic DNA
- Site of DNA replication
What type of membrane is the Nuclear envelope
A Double Membrane
What is the role of the Inner Nuclear Membrane and the Outer Nuclear Membrane?
- Inner defines nucleus
- outer membrane connects to the endoplasmic reticulum
Where do both Nuclear Membranes fuse
At the Nuclear Pore
What is the Nuclear Lamina composed of
- intermediate filaments
- Membrane associated Proteins
What is the role of the Nuclear Lamina?
- Provides mechanical support
- Regulates DNA Replication and Cell Division
What are the 4 main parts of Mitochondrion?
- Outer Membrane
- Inner Membrane
- The Cristae
- The Matrix
Name 5 Functions of the mitochondria
Energy Conversion
site of metabolic reactions
Regulation of Apoptosis
Heat production
Calcium Homeostasis
Where can Transport Vesicles be found?
- From Rough ER to Golgi Apparatus
- From Golgi Apparatus to Cell Membrane
- From Golgi Apparatus to compartments of the endomembrane system
What are Cisternae
Stacks of flattened membranous sacks
What are the 3 main regions of the Golgi Apparatus?
Cis face - entry side
Medial - central layers
Trans face - Exit side
What are the 3 key roles of the Golgi Apparatus?
- protein modification
- Lipid modification
- Protein sorting or Exporting
What are 2 features of Lysosomes
- Limiting membrane
- Dense lumen
What is protease used to digest
proteins
peptides
